Acacia exocarpoides

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Acacia exocarpoides
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Caesalpinioideae
Clade: Mimosoid clade
Genus: Acacia
Species:
A. exocarpoides
Binomial name
Acacia exocarpoides
Acacia exocarpoidesDistMap343.png
Occurrence data from AVH
Synonyms [1]

Racosperma exocarpoides(W.Fitzg.) Pedley

Acacia exocarpoides is a species of flowering plant in the family Fabaceae and is endemic to Western Australia. It is a broom-like, glabrous shrub with erect, spiny branchlets, few, inconspicuous phyllodes, spherical heads of golden yellow flowers and thinly leathery pods somewhat like a string of beads.

Contents

Description

Acacia exocarpoides is a fastigiate, glabrous shrub that typically grows to a height of 1–3 m (3 ft 3 in – 9 ft 10 in). Its outermost branchlets are ascending to erect, straight and sparingly divided, terete, finely striated and coarsely spiny. There are few, inconspicuous phyllodes that are frequently shed, 8–18 mm (0.31–0.71 in) long and 1 mm (0.039 in) wide with four veins. The flowers are borne in a spherical head in axils, on a peduncle 5–10 mm (0.20–0.39 in) long, each head with 28 to 35 golden yellow flowers. Flowering occurs from June to August, and the pods are thinly leathery, up to 150 mm (5.9 in) long and 5–7 mm (0.20–0.28 in) wide, dark brown and superficially resemble a string of beads. The seeds are egg-shaped, 4–6 mm (0.16–0.24 in) long and shiny dark brown to blackish, with a dull yellow, waxy aril as long as the seed. [2] [3] [4] [5]

Taxonomy

Acacia exocarpoides was first formally described in 1904 by William Vincent Fitzgerald in the Journal of the West Australian Natural History Society from specimens he collected between Lennonville and Boogardie in 1903. [6] [7] Fitzgerald noted "without flowers, this remarkable species would be readily passed by as Exocarpus aphylla, R.Br.", (now known as Exocarpos aphyllus ). [8] The specific epithet (exocarpoides) means ' Exocarpus -like'. [9]

Distribution

This species of wattle grows in rocky, clayey loam near Meekatharra, in the Mount Gibson-Mullewa-Mount Magnet area and in the Rutters Soak-Rason Lake area of the Great Victoria Desert, where it is usually found in Acacia aneura communities, in the Avon Wheatbelt, Great Victoria Desert, Murchison and Yalgoo bioregions of Western Australia. [2] [5]

Conservation status

Acacia exocarpoides is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions. [5]

See also

References

  1. 1 2 "Acacia exocarpoides". Australian Plant Census. Retrieved 11 December 2025.
  2. 1 2 Maslin, Bruce R. "Acacia exocarpoides". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 11 December 2025.
  3. ↑ Maslin, Bruce R. "Acacia exocarpoides". Australian Biological Resources Study. Retrieved 11 December 2025.
  4. ↑ "Acacia exocarpoides". World Wide Wattle. Western Australian Herbarium. Retrieved 12 January 2019.
  5. 1 2 3 "Acacia exocarpoides". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  6. ↑ "Acacia exocarpoides". APNI. Retrieved 9 December 2025.
  7. ↑ Fitzgerald, William V. (1904). "Additions to the West Australian Flora". Journal of the West Australian Natural History Society. 2 (1): 7–8. Retrieved 11 December 2025.
  8. ↑ "Exocarpos aphyllus". Australian Plant Census. Retrieved 11 December 2025.
  9. ↑ George, Alex S.; Sharr, Francis A. (2023). Western Australian Plant Names and Their Meanings - A Glossary (fifth ed.). Kardinya: Four Gables Press. p. 199. ISBN   9780645629538.
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